Plug



FIG. 1 is a top view of a plug showing the preferred embodiment of my new design;

FIG. 2 is a front view thereof; (rear view is symmetrical as front view);

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a perspective view thereof. 

The ornamental design for a plug, as shown and described. 